1 files changed, 58 insertions, 0 deletions
diff --git a/exec/java-exec/src/main/java/org/apache/drill/exec/resourcemgr/config/selectors/OrSelector.java b/exec/java-exec/src/main/java/org/apache/drill/exec/resourcemgr/config/selectors/OrSelector.java
new file mode 100644
index 000000000..5e8b2f9e0
--- /dev/null
+++ b/exec/java-exec/src/main/java/org/apache/drill/exec/resourcemgr/config/selectors/OrSelector.java
@@ -0,0 +1,58 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.drill.exec.resourcemgr.config.selectors;
+
+import com.typesafe.config.Config;
+import org.apache.drill.exec.ops.QueryContext;
+import org.apache.drill.exec.resourcemgr.config.exception.RMConfigException;
+
+import java.util.List;
+
+/**
+ * Complex selector whose value is list of other Simple or Complex Selectors. There has to be at least 2 other
+ * selectors configured in the value list for this selector. It does OR operation on result of all the child selectors
+ * configured with it to evaluate if a query can be admitted to it's ResourcePool or not.
+ *
+ * Example configuration is of form:
+ * <code></><pre>
+ * selector: {
+ *   or: [{tag: "BITool"},{tag: "operational"}]
+ * }
+ * </pre></code>
+ */
+public class OrSelector extends ComplexSelectors {
+  private static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(OrSelector.class);
+
+  OrSelector(List<? extends Config> configValue) throws RMConfigException {
+    super(SelectorType.OR, configValue);
+  }
+
+  @Override
+  public boolean isQuerySelected(QueryContext queryContext) {
+    for (ResourcePoolSelector childSelector : childSelectors) {
+      // If we find any selector evaluating to true then no need to evaluate other selectors in the list
+      if (childSelector.isQuerySelected(queryContext)) {
+        logger.debug("Query {} is selected by the child selector of type {} in this OrSelector",
+          queryContext.getQueryId(), childSelector.getSelectorType().toString());
+        return true;
+      }
+    }
+
+    return false;
+  }
+}